While Conchita is correct, this hasn’t always been the case. Many verbs have been adjusted in relatively recent years due to their new-found commonality. That being said, traditionally speaking “dived” is correct, and “dove” isn’t a word. However, as with many words today it seems that if people use them enough, we’ll throw them in the dictionary regardless of correctness.
There’s no real correct answer here, just a preference of usage, though in writing i would encourage using the traditionally correct form: “dived”.